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CVE-2016-10931

24
FAUCET Score

CVE-2016-10931 describes a critical man-in-the-middle vulnerability in the rust-openssl crate prior to version 0.9.0, stemming from disabled certificate verification by default and a lack of hostname verification API. With a CVSS score of 8.1 (High), this flaw allows unauthenticated attackers to intercept and manipulate SSL/TLS communications with high impact on confidentiality, integrity, and availability, though it requires high attack complexity. Despite its severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.9.0CPE matchmatch criteria
cpe:2.3:a:rust-openssl_project:rust-openssl:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.74%
Probability of exploitation in next 30 days
EPSS Percentile
51.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0075 is in the 20th percentile among its peer group of 8,918 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

rustpatch availablevia ghsa
Product: opensslFixed in: 0.9.0

Vendor Advisories (1)

rustGHSA-34p9-f4q3-c4r7high

Improper Certificate Validation in openssl

Aug 25, 2021

References

rustsec.org / advisories/RUSTSEC-2016-0001.html
Release NotesVendor Advisory